I bought my h9 some months ago, and I just wanted to report that I have had many problems trying to use the control app using my iphone SE. I know its no problem with the H9 as I have tested it with other devices. Seems to be something wrong with the bluetooth on this phone. I have been through many troubleshooting procedures none of which worked. So my advice would be avoid this phone if you are an H9 user, thanks
We have tested H9 Control with iPhone SE many times and it works fine. What's the iOS version on your SE? Can your SE connect to other Bluetooth devices?